Acendi uma vela na cozinha.

Acendi is the 1st person singular form of the verb acender in the pretérito perfeito (simple past).

So it means I lit or I turned on, depending on context.
In this sentence, because of vela, it means I lit.

A quick breakdown:

• acender = to light, to switch on
• eu acendi = I lit / I switched on

Portuguese often leaves out the subject pronoun when it is clear from the verb ending.

So instead of saying:

• Eu acendi uma vela na cozinha

it is very natural to say:

• Acendi uma vela na cozinha

The ending -i in acendi already tells you the subject is I.

Including eu is possible, but it usually adds emphasis, contrast, or clarity.

Portuguese usually uses an article more often than English does.

Here, uma vela means a candle:

• uma = a / one
• vela = candle

Saying just Acendi vela would sound incomplete or unnatural in normal standard Portuguese for this meaning.

So uma vela is the natural way to say a candle.

Because vela is a feminine noun.

In Portuguese, articles must agree with the noun:

• um for masculine singular nouns
• uma for feminine singular nouns

So:

• um livro = a book
• uma vela = a candle

You normally have to learn each noun with its gender.

Na is a contraction of:

• em = in / on / at
• a = the

So:

• em + a = na

That means:

• na cozinha = in the kitchen

Portuguese uses these contractions very regularly, so they are important to recognize.

Other common ones:

• no = em + o
• nos = em + os
• nas = em + as

Because in this sentence the speaker means in the kitchen, referring to a specific room.

So Portuguese naturally uses the definite article:

• na cozinha = in the kitchen

If you said em cozinha by itself, it would usually sound unnatural here.

Portuguese often uses the definite article in places where English does too, and sometimes even where English does not.

Yes. Acendi uma vela na cozinha is the most neutral word order, but Portuguese allows some flexibility.

For example:

• Na cozinha, acendi uma vela.

This puts more focus on where it happened.

The original sentence is the most straightforward and neutral:

• verb + object + place

No. Acender can be used for things you light or switch on.

Examples:

• acender uma vela = to light a candle
• acender o fogo = to light the fire
• acender a luz = to turn on the light

So the verb covers both lighting with flame and switching something on, depending on the object.

In European Portuguese, cozinha is roughly pronounced like koo-ZEE-nya.

The important part is nh, which sounds like the ny in canyon.

So:

• cozinha → the nh is not a normal English n
• it is a soft ny sound

Also, European Portuguese often reduces unstressed vowels, so the real pronunciation may sound a bit tighter and less open than the spelling suggests.

A rough guide is:

• Acendi → ah-sen-DEE
• uma → often sounds close to OO-muh in careful speech, but reduced in fast European Portuguese
• vela → VEH-luh
• na → nuh
• cozinha → koo-ZEE-nya

A more important point than exact English-style spelling is that European Portuguese often:

• reduces unstressed vowels
• links words together smoothly
• makes final a sound more like a weak uh

So the whole sentence may sound more connected and compressed than you expect from the spelling.

This is the pretérito perfeito simples, the normal tense for a completed action in the past.

So Acendi uma vela na cozinha means the action happened and is finished.

It is used for:

• single completed actions
• events at a specific moment
• things that happened and ended

Here, the act of lighting the candle is seen as a completed event.

No, not usually.

Acendi is the normal, simple way to say I lit.

Tenho acendido is a compound form and usually suggests repetition over time or a continuing pattern, more like:

• I have been lighting a candle in the kitchen
• I have lit a candle in the kitchen repeatedly

So for one finished event, acendi is the correct and natural choice.

Yes. Vela can also mean sail in another context.

For example:

• vela de um barco = the sail of a boat

But in acendi uma vela, the meaning is clearly candle, because you light a candle. Context removes the ambiguity.

No. It must be na cozinha, not no cozinha.

That is because cozinha is feminine:

• a cozinha

So:

• em + a cozinha = na cozinha

If the noun were masculine, you would use no:

• no quarto = in the bedroom

Yes, it is completely natural.

It is a simple, everyday sentence with:

• a common past tense form
• normal omission of the subject pronoun
• correct article use
• the standard contraction na

A speaker in Portugal would understand it immediately and find it natural.